RE: simple - Croft.

Posted by morricab (S) on September 24, 2014 at 03:02:04

In Reply to: simple - Croft. posted by mbnx01 on September 22, 2014 at 10:08:02:

My NAT has a simple circuit and a sophisticated power supply. The main circuit is a tube for voltage gain, a tube for a driver and ONE big industrial MOSFET for the output stage (yes it's single ended). THat one big MOSFET is strapped to a very large heat sink. The power supply is sophisticated in that it uses active regulation even for the output stage (another identical industrial MOSFET on it's own huge heat sink), choke filtering (4 chokes!) and monster power transformers with and a lot of uF of capacitance.

The circuit though is super simple, direct coupled (no caps or transformers in the path) and no negative feedback.

Not quite as simple as a SIT from Pass but not too far away.

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Follow Ups Full Thread

Topic - A tale of two amplifiers. - mbnx01 12:38:32 09/21/14 (23)

Both have WAY too many parts for the purpose of amplifying music IMO - morricab 08:34:16 09/22/14 (14)

If you want simple - Doublej 09:39:48 09/22/14 (12)

RE: If you want simple - morricab 02:56:12 09/24/14 (0)

RE: If you want simple - AbeCollins 13:50:27 09/22/14 (6)

RE: If you want simple - Inmate51 20:54:55 09/22/14 (0)

That's how the First Watt SIT amps work... - E-Stat 14:36:43 09/22/14 (4)

RE: That's how the First Watt SIT amps work... - AbeCollins 15:23:29 09/22/14 (3)

Actually - E-Stat 15:35:08 09/22/14 (2)

Interesting... - AbeCollins 21:42:54 09/22/14 (1)

Well - E-Stat 10:36:58 09/24/14 (0)

simple - Croft. - mbnx01 10:08:02 09/22/14 (3)

RE: simple - Croft. - morricab 03:02:04 09/24/14 (0)

RE: simple - Croft. - Frihed89 07:24:36 09/23/14 (0)

Hmmm... That Series 7 "R" looks mighty tasty! - Dman 11:01:27 09/22/14 (0)

I see what you mean - airtime 08:55:15 09/22/14 (0)

Cost of parts, R&D, labor, etc.... - airtime 06:32:16 09/22/14 (0)

RE: A tale of two amplifiers. - John Elison 22:21:19 09/21/14 (1)

RE: A tale of two amplifiers. - fantja 11:06:05 09/22/14 (0)

RE: A tale of two amplifiers. - Sprezza Tura 19:08:13 09/21/14 (1)

RE: A tale of two amplifiers. - pictureguy 20:44:31 09/21/14 (0)

RE: A tale of two amplifiers. - AudioSoul 17:39:48 09/21/14 (0)

RE: A tale of two amplifiers. - fantja 15:41:50 09/21/14 (0)

RE: A tale of two amplifiers. - pictureguy 13:22:45 09/21/14 (0)

Follow Ups

RE: simple - Croft. - morricab 03:02:04 09/24/14 (0)

RE: simple - Croft.

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